Essential Fatty Acids
These suggestions are in response to the following questions:
- I'd be curious to know how many of the readers on this list (ShowDals) use EFA (essential fatty acid)supplements, which ones, and why. Has anyone seen any information on negative results - other than perhaps loose stool from excessive amounts - or have you had a problem with using them?
- There are no actual guidelines for using EFAs, so most of us are still experimenting. I started by using Flax seed oil, but have switched to fish oil plus a bit of olive or sunflower oil. Works wonderfully well for us. I'm still trying to decide how much to use, especially on a pregnant bitch, and when to start pups on it. There is also the question of how much Omega 3 should be used to balance out the Omega 6. What has worked for you?
- Some of the most commonly used supplements include Derm Caps, similar products from Foster & Smith, and other combination products, plus flax seed, fish, borage, primrose, sunflower, and olive oils. Which do you prefer and why?
- Most of my dogs have the soft fine coats, but several have the harder coats, and I've noticed those coats are much plusher when the dogs are on EFA supplements. When I've judged in other parts of the country I've noticed many coarse coats and have often wondered if all coat types get softer when the dogs receive EFA supplements. What have you found?
Supplementing with vegetable oils can add a significant amount of calories. Each tablespoon of
vegetable oil (regardless of type) contains about 120 calories. An 8-oz cup of dry kibble
typically provides between 350 and 480 calories. Therefore a tablespoon of added oil can
calorically replace 1/4 cup of kibble -- owners of overweight dogs take note!
I think a few years back, in the GAZETTE magazine or so, had an article about "Lipiderm" in
it. The other interesting find on this is that, besides Lipiderm being a natural supplements, it is
water soluble which makes it different than most fatty acids which are oil-base. It also does act
like a natural anti-inflammatory of the skin, due to allergy, itchy skin, and what not.
I usually would tell people to try Lipiderm on their dogs at least a month to really see a good
result. Just follow the instruction on the bottle. With the regular formula (capsules): with dals
weigh between 31-70 lbs. = recommended 2-3 caps/day (under normal condition to maintain
good coat), but I see a breeder friend who would give her pregnant and nursing bitches double
their normal dosage. They also come in concentrated formula for large breed, so you don't have
to give them that many capsules as you would with the regular formula (for small and medium
breeds). So far, I see pet stores like PetsMart and Petco carry them. Most mail-order stores have
them as well.
And.. NO, we've never had a loose stool or soft stool problem from giving Lipiderm. My dal
girl likes to pop the fish oil capsules in her mouth, she'll eat it plain but Lipiderm has a bit bitter
taste than fish oil, I just put it in with her food. She doesn't like the liquid kind (guess it's
because of the bitterness), but then my older boy doesn't like the capsules, always left them
behind... Sure enough, I have to get both kinds just to suit his and her royal highness's'
likings!!!
More general information
Therapy now leans toward high n-3 fatty acids, and sources high in fish oil seem to be preferred
(we use generic menhaden or salmon oil in our practice, although 3-V caps are one veterinary
source). Vegetable and other meat fats are too high in n-6 and other fatty acids. A very good
review of commercial products containing omega-3 and -6 fatty acids can be found in an older
review paper published in one of the smaller veterinary journals a few years ago, by Phil
Roudebush. I can't find the reference on this computer, but your Hill's rep could probably get it
for you.
Fish oil contains pre-formed EPA and DHA, and fish oil is what has been used in most studies
showing benefit of fatty acid supplementation. Flaxseed and flaxseed oil, as contained in
Missing Link, contain another n-3 fatty acid - ALA. In humans, ALA is converted to EPA and
DHA at 10% efficiency, and in cats, it isn't converted at all. In dogs, a recent study published in
the Journal of Nutrition showed that supplementation with ALA did not raise blood DHA
levels. Although Missing Link and flaxseed products may actually help some animals and
improve coats, I suspect that it's because it's a general nutritional supplements with a little extra
good quality fat and a lot of vitamins and minerals. If there are real inflammatory processes
involved, such as atopy leading to skin lesions described by the original poster, I think fish oil
will be the most effective, least expensive and most available supplement to try. My dose is one
regular strength (1000mg fish oil, 300mg of DHA and EPA) per 10-15 pounds of dog or cat.
Susan G. Wynn, DVM
Where I live, fish oil supplements (including fish body oils, salmon oil and cod liver oil commonly do not contain omega 6. Omega 6 supplements are usually separate in the form of
evening primrose oil, or included in general omega supplements which include omegas 3, 6 and 9.
Some other notes on omega 3 and 6:
http://www.vetmed.wsu.edu/boeing/small_animal_medicine/crf.htm
"The omega 3 and omega 6 fatty acids are degraded to different eicosanoids. Preliminary studies suggest that diets high in omega 3 polyunsaturated fatty acids preserve renal function
in dogs with induced renal failure whereas diets high in omega 6 fatty acids hasten decline." When I questioned my vet about omega 3 and 6, he advised that omegas 3 and 6 work in a complementary manner. A certain amount of omega 6 is necessary. Our natural diet contains much more omega 6 than 3, and that is why we need to supplement it with omega 3, especially for renal failure. Dietary sources of omega-6 fatty acids include animal tissue and plant seeds, while cold water marine fish oils, flax seed and plant leaves contain omega-3 fatty acids."
http://www.speedyvet.com/NIP/omega2/omega2.htm
"Functions of essential fatty acids
"A number of years ago we had a discussion on an earlier Dal list on the use of EFA supplementation. Digging into my archives I located some comments I made at that time.
I have looked at the potential benefits and economy of supplementing with polyunsaturated oils of various types and for various purposes. First, as most of you know, Donald Collins, "The Collins Guide to Dog Nutrition", was probably the earliest proponent of fatty acid supplementation, primarily for the additional concentrated calories. He states (p 179), "[Corn
Oil] the best fatty acid supplementation, at a price any dog feeder can afford." However, his primary reason for pushing corn oil was the problem with rancidity of the oils prepackaged in
kibbled rations.
It later became obvious to nutritionists, human and canine, alike, that most vegetable oils contain virtually all of the so-called Omega-6 oils and very little of the Omega-3 oils, (also
known as linoleic and linolenic fatty acids, FAs, respectively). Both Omega-6 and Omega-3 FAs are essential to the human diet, that is, they cannot be derived from other sources. I read
recently that canines do not require linolenic Fas, AAFCO Nutrient profiles as quoted in TODAY'S BREEDER, issue 20, p 5, but I feel that this may well change as the benefits of
balanced EFAs become apparent.
Oil of Evening Primrose does contain a reasonable balance of both FAs: 72 g/100g of linoleic and 8.6 g/100g of gamma linolenic, but I have found it to be fairly expensive at the health food stores that carry it. OTOH, flaxseed (linseed) oil is reasonably priced and contains the mix: 18 g/100g of linoleic and a whopping 45 g/100g of linolenic. Only perilla oil has a higher linolenic percentage, and I haven't found any affordable sources for it. It would seem that if FA supplementation is to be done to the degree that is dietarily significant, flaxseed oil would seem to be the way to go (unless there are some other benefits to be found in the more expensive oil of evening primrose). By dietarily significant I would assume nominally 0.5 to 1 Tbsp per day which amounts to 7 to 15 g (and about 70 to 135 calories). Capsules are often formulated in 1 g sizes which means about 7 - 15 capsules/day.
As far as the oil, corn oil isn't all that digestible and doesn't contain the fatty acids necessary for boosting the immune system or making any kind of marked difference in your [dog], but any oil is better than no oil! You may want to try and find some fish oil, even cod liver, rather than
corn.
First, corn oil isn't that bad -- and cod liver oil isn't that good! The classic text on feeding your
dog, "The Collins Guide to Dog Nutrition," Donald R. Collins, DVM, touts the benefits and
economy of adding corn oil to the dog's diet. Collins states: "It is my opinion that fatty acid
supplements constitute one of the biggest wastes of money made by the dog feeder. They are usually bought to improve the dog's haircoat or general condition. The only problem most dogs
suffering from dull haircoat or poor condition have, is a lack of total digestible calories -- not a
deficiency of fatty acids. Many dogs which appear to be responding to a fatty acid supplement
are actually responding to the addition of calories to their diet, calories provided by ALL the
fats in the supplement. ... [corn oil], the best fatty acid supplement, at a price any dog feeder
can afford. Corn oil, fed at sufficient levels to provide a dog with the fat and energy itneeds,
will also provide a dog with more than enough fatty acids." Collins fails to note that corn oil (as
well as most other vegetable oils) is nearly all omega-6 with little or no omega-3 FAs. Next, cod liver oil, which has a better balance of linoleic (Omega-6) EFAs and linolenic
(Omega-3) EFAs, is toxic at high doses ("The Omega-3 Phenomenon," by Donald Rudin, MD
and Clara Felix). It also has a very high level of cholesterol (1000 mg per 100 g compared with
312 mg per 100 g for whole eggs). The toxicity of cod liver oil apparently arises because of the
high levels of vitamin A that it contains. As is well known, vitamin A (and D) is fat soluble,
stored in the liver, and is toxic if you OD. What constitutes an overdose for humans depends on
the individual, but some people react to as little as a single 20,000 IU capsule, while others take
50,000 IU daily for years with no ill effects ("The Doctor's Vitamin & Mineral Encyclopedia,"
Sheldon S. Hendler, MD, PhD). I would suggest that, if you desire a balanced linolenic/linoleic
EFA supplement, you choose flaxseed oil, oil of evening primrose, or fish body oils. It should
be noted, however, that all these oils are highly perishable, have a short shelf life and need to
be refrigerated; they are best preserved using vitamin E. According to my reference, "The Omega-3 Phenomenon", by Rudin & Felix, the linolenic
(Omega-3) content of safflower oil is insignificant, as is the case with most other vegetable
oils. To be specific, the safflower oil listing is as follows: linoleic 58g/100g, linolenic 0g/100g,
total EFA 58g/100g, (non-essential FA) NEFA 33g/100g, overall fat content 100%. The only vegetable oils that are listed with any significant Omega-3 at all are: chestnut, hempseed, perilla, soybean, walnut, wheat germ all with alpha linoleic FA and evening primrose with gamma linoleic. The alpha - gamma distinction refers to the location of the unsaturated
carbon-hydrogen bond in the molecule.
Perhaps a quote from the referenced book (p 11) might help:
Whether this applies equally to canines as it does to humans remains an unresolved question.
I'll say off the top that I don't use supplements other than yoghurt and some vegies - not through any particular philosophy but more that I never seem to remember to give them (or take them myself for that matter).
However, one thing I have noticed over the years of going to the various shows in the US, is that "in general" the coats on our dogs here in BC seem to be softer than many of the coats on
dals I've seen at US shows. This has seemed to hold true even when the bloodlines were very close. I myself have dals with coats of varying lengths but all are very soft. I don't know if I'd call them plush. There are local people here with dogs from other lines as well. Although they feed a raw diet or half raw diet - their coats seem to be the same as mine.
In the lower mainland here, the UV index tends to be quite low to medium low - even on hot days. We also don't get a huge temperature variation. And our water tends to be soft. I've been
wondering if these three things might be factors in the softness of dal coats the way they are with human hair: UV index, temperature variation, and water.
A dal person from New Zealand was up here last week and I had a chance to visit with her. She commented on how soft the dal coats were here compared to at home in New Zealand. The UV index in New Zealand and Australia is very severe these days even on cloudy days.
I thought that might be true (though don't know for sure) for some of the southern states such as
Florida and Texas.
What do people Use?
Marietta, GA
Safety issues
"The work that is done by essential fatty acids (EFA) in our bodies - from assuring growth in children to maintaining cell membranes and producing special hormone-like substances
(prostaglandins) - cannot be done by Omega-6 alone; Omega-3 EFA are also needed. It now appears that for many purposes Omega-3 EFA actually do a much better job than Omega-6. The best job is done when they are combined in the right proportions."